The following Air/Fuel Ratio data was measured on a Dynojet Dynamometer using a 2007 Ducati GT1000.  The test motorcycle was fitted with a stock euro map ECU and Staintune slip-on exhaust.  The tests were performed under load at 3,000 RPMs and again at 3,500 RPMs with and without a O2 Manipulator installed.  The Air/Fuel Ratios were measured from the test ports located on the factory exhaust headers.  Note the color trace legend as the two charts are different.

Air/Fuel Ratio Data at 3,000 RPMs
Green Trace = Stock, No O2 Manipulator Installed
Red Trace = O2 Manipulator Installed and set at a 13.4/1 reduction

Air/Fuel Ratio Data at 3,500 RPMs
Red Trace = Stock, No O2 Manipulator Installed
Blue Trace = O2 Manipulator Installed and set at a 13.4/1 reduction